Perhaps you should try some spelling variations:
"supply china's international economics." » "supply china international economics.", "supply chinese international economics.", "supply china's integration economics.", "supply chain's international economics.", "support china's international economics.", "supply china's international economic."
"supply chains integration policies." » "supply chains immigration policies.", "supply chains international policies.", "supply chains migration policies.", "supply chain integration policies.", "supply china's integration policies.", "supply channel integration policies."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply chains integration policies.") OR ("supply china's international economics."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply chains integration policies.\") OR (\"supply china's international economics.\"))".
• Removing quotes may allow a broader search: (( supply chains integration policies. ) OR ( supply china's international economics. )).
• Adding a wildcard symbol may retrieve word variants: (("supply chains integration policies.") OR ("supply china's international economics."))*.